I'm using a circuit that takes 300mA from a wall-wart 9VDC linear unregulated power supply.
What would be an estimate of the watts it uses from the power lines (in the UK, so ~240VAC)?
Many thanks.
Steve
Power consumption of wall-wart power supply?
Sep 03, 2004
4 Replies
Three.
the
Fully loaded about 6watts. Just sitting there, about 3watts regards john
300 mA x 9 V = 2.7 watts coming out of the wall wart.
Allowing for some inefficiency, maybe as much as 5 watts in.
the
Many thanks for the replies to this thread - very simple now I realise! I only need a rough figure so that's great.
Steve
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